Electronic device

ABSTRACT

A display device is provided, including two substrates and a liquid crystal layer. Each of the substrates has two opposite surfaces and two opposite sides. The liquid crystal layer is sandwiched between the two substrates. At least one of the two substrates has an inclined portion on at least one of the two opposite sides which is connected to one of the two opposite surfaces, and has an included angle greater than 90 degrees and less than 180 degrees in association with the connected surface.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of application Ser. No. 17/029,903,filed Sep. 23, 2020, the entirety of which is incorporated by referenceherein.

BACKGROUND OF THE DISCLOSURE Field of the Disclosure

The application relates in general to a display device, and inparticular, to a display device having a liquid crystal layer.

Description of the Related Art

The current trend of display devices having a display panel (forexample, in televisions, tablet computers or smartphones) is movingtowards large screens and narrow bezels. However, due to the narrowbezels in an electronic device, such an electronic device may experiencelight leakage at its edge. Therefore, how to address the aforementionedproblem has become an important issue.

BRIEF SUMMARY OF DISCLOSURE

To address the deficiencies of conventional products, an embodiment ofthe disclosure provides a display device, including two substrates and aliquid crystal layer. Each of the substrates has two opposite surfacesand two opposite sides. The liquid crystal layer is sandwiched betweenthe two substrates. At least one of the two substrates has an inclinedportion on at least one of the two opposite sides which is connected toone of the two opposite surfaces, and has an included angle greater than90 degrees and less than 180 degrees in association with the connectedsurface.

BRIEF DESCRIPTION OF DRAWINGS

The disclosure can be more fully understood by reading the subsequentdetailed description and examples with references made to theaccompanying drawings, wherein:

FIG. 1 is a schematic diagram of a display device according to anembodiment of the disclosure;

FIG. 2 is a schematic diagram of a substrate according to an embodimentof the disclosure;

FIG. 3 is a schematic diagram of a conventional substrate;

FIG. 4 is a cross-sectional view along line A-A′ in FIG. 2 ;

FIG. 5A is a schematic diagram of an actually manufactured substrateaccording to some embodiments of the disclosure;

FIG. 5B is a schematic diagram of an actually manufactured substrateaccording to some embodiments of the disclosure; and

FIG. 5C is a schematic diagram of an actually manufactured substrateaccording to some embodiments of the disclosure.

DETAILED DESCRIPTION OF DISCLOSURE

The making and using of the embodiments of the display device arediscussed in detail below. It should be appreciated, however, that theembodiments provide many applicable inventive concepts that can beembodied in a wide variety of specific contexts. The specificembodiments discussed are merely illustrative of specific ways to makeand use the embodiments, and do not limit the scope of the disclosure.

Certain terms are used throughout the description and following claimsto refer to particular components. As one skilled in the art willunderstand, electronic equipment manufacturers may refer to a componentby different names. This document does not intend to distinguish betweencomponents that differ in name but not function. In the followingdescription and in the claims, the terms “include”, “comprise” and“have” are used in an open-ended fashion, and thus should be interpretedto mean “include, but not limited to . . . ”. Thus, when the terms“include”, “comprise” and/or “have” are used in the description of thepresent disclosure, the corresponding features, areas, steps, operationsand/or components would be pointed to existence, but not limited to theexistence of one or a plurality of the corresponding features, areas,steps, operations and/or components.

In addition, in this specification, relative expressions are used. Forexample, “below” and “above” are used to describe the position of oneelement relative to another. It should be appreciated that if a deviceis flipped upside down, an element that is “below” will become anelement that is “above”.

When the corresponding component (such as layer or area) is referred to“on another component (or the variant thereof)”, it may be directly onanother component, or other component may exist between them. On theother hand, when the component is referred to “directly on anothercomponent (or the variant thereof)”, any component does not existbetween them. Moreover, when a component is referred to “on anothercomponent (or the variant thereof)”, the component and the othercomponent has a positional relationship in a top view direction, thecomponent can be disposed above or below the other component, and thepositional relationship is based on the orientation of the device.

In some embodiments of the disclosure, terms concerning attachments,coupling and the like, such as “connected”, refer to a relationshipwherein structures are secured or attached to one another eitherdirectly or indirectly through intervening structures, unless expresslydescribed otherwise.

It should be understood that, although the terms “first”, “second”, etc.can be used herein to describe various elements, layers and/or sections,these elements, layers and/or sections should not be limited by theseterms. These terms are only used to distinguish one element layer orsection from another element, layer or section. Thus, a first element,layer or section discussed below could be termed a second element, layeror section without departing from the teachings of the presentdisclosure. For brevity, the terms “first”, “second”, etc. may not beused in the specification. The first element and/or the second elementin claims can be referred to any element(s) that meets the descriptionin the specification without departing from the spirit and scope of theinvention as defined by the appended claims.

The terms “about” and “substantially” typically mean+/−15% of the statedvalue, for example, +/−10%, +/−5%, +/−3%, +/−2%, +/−1%, or +/−0.5% ofthe stated value. The stated value of the present disclosure is anapproximate value. When there is no specific description to the terms“about” and “substantially”, the stated value includes the meaning of“about” or “substantially”. Unless defined otherwise, all technical andscientific terms used herein have the same meaning as commonlyunderstood by one of ordinary skill in the art to which this disclosurebelongs. It should be appreciated that each term, which is defined in acommonly used dictionary, should be interpreted as having a meaningconforming to the relative skills and the background or the context ofthe present disclosure, and should not be interpreted in an idealized oroverly formal manner unless defined otherwise. Moreover, for brevity,some elements can be suitably omitted in the figures.

Referring to FIG. 1 , a display device 10 in the disclosure can includea rectangular display device, a non-rectangular display device, or acurved display device, but it is not limited thereto. The display device10 can include a bendable display device or a flexible display device,but it is not limited thereto. The display device 10 can include aliquid crystal display device or other suitable display device, but itis not limited thereto. The display device 10 can include a splicingdisplay device, but it is not limited thereto. In this disclosure, thedisplay device 10 can include a thin film transistor liquid crystaldisplay (TFT-LCD), and can be applied to a public information display(PID), a television, a monitor, a notebook PC, a smart phone, or a smartwatch, but it is not limited thereto.

The display device 10 primarily includes a light source 100, a firstsubstrate 200, a liquid crystal layer 300, a second substrate 400, and aframe 500. The first substrate 200 is disposed between the light source100 and the liquid crystal layer 300, and the liquid crystal layer 300is disposed between the first substrate 200 and the second substrate400. In other words, the liquid crystal layer 300 is sandwiched betweenthe first substrate 200 and the second substrate 400. The light source100, the first substrate 200, the liquid crystal layer 300, and thesecond substrate 400 can be disposed in the frame 500. The frame 500 canprotect or affix the aforementioned members of the display device 10,but it is not limited thereto.

The light source 100 can be a backlight module, including one or moreluminous bodies to provide light T to the first substrate 200. In someembodiments, the light source 100 is disposed adjacent to the firstsubstrate 200. In some embodiments, the light T emitted from the lightsource 100 passes through the first substrate 200, the liquid crystallayer 300, and the second substrate 400, and leaves the display device10 from an upper surface 401 (a display surface) of the second substrate400.

For example, the luminous bodies in the light source 100 can include alight-emitting diode (LED), a light tube (such as cold cathodefluorescent lamp, CCFL), or other suitable light source. Thelight-emitting diode can be an inorganic light-emitting diode, anorganic light-emitting diode (OLED), a mini LED, a micro LED, a quantumdot light-emitting diode (QLED or QD-LED), other suitable light-emittingdiode, or a combination of the aforementioned LEDs, but it is notlimited thereto.

In this embodiment, the light source 100 is direct-type backlight. Insome embodiments, the light source 100 can be replaced to a side-lighttype backlight module. In some embodiments, the light source 100 is notan ambient light.

Referring to FIGS. 1 and 2 , a plurality of wires 210 can be arranged ona side of the first substrate 200 facing the liquid crystal layer 300,and the wires 210 can be electrically connected to a circuit board Wdisposed on a side of the first substrate 200. The circuit board W canbe electrically connected to an external circuit. The signal of theexternal circuit (such as a control signal) can be transmitted to thefirst substrate 200 via the circuit board W. In some embodiments, thecircuit board W can be configured to electrically connect to othercomponents in the display device 10. Besides the wires 210, a transistor(such as a thin film transistor), a color filter, a light shieldinglayer, or other suitable member and/or a combination of theaforementioned members can be disposed on the first substrate 200, butit is not limited thereto. The first substrate 200 can include aflexible substrate or an inflexible substrate. The material of the firstsubstrate 200 can include glass, quartz, polycarbonate (PC), polyimide(PI), polypropylene (PP), polyethylene terephthalate (PET), othersuitable material, or a combination of the aforementioned materials, butit is not limited thereto. The wires 210 can be data lines, data cables,common lines, or touchscreen lines, but it is not limited thereto. Thewires 210 can include lines with metal (such as aluminum, copper, or thealloy thereof) and/or transparent conductive material (such as indiumtin oxide), but it is not limited thereto. In some embodiments, thewires 210 can be disposed on the first substrate 200 and/or the secondsubstrate 400. For example, the wires 210 can be disposed on both thefirst substrate 200 and the second substrate 400 (such as the surface ofthe second substrate 400 facing the liquid crystal layer 300), but it isnot limited thereto. In some embodiments, one or more insulation layerscan be disposed between the wires 210 and the substrate (such as thefirst substrate 200). The insulation layer(s) can include SiOx, SiNx,PFA, other suitable material, or a combination of the aforementionedmaterial, but it is not limited thereto. The circuit board W can includeflexible printed circuit (FPC) and chip on film (COF), but it is notlimited thereto.

One or more light shielding members 410 or color filters (not shown) canbe disposed on a side of the second substrate 400 facing the liquidcrystal layer 300. The material of the second substrate 400 can be thesame as or similar to that of the first substrate 200, so that thematerial thereof are not repeated in the interest of brevity. In someembodiments, the shielding member 410 can be a black matrix having agrid structure, but it is not limited thereto. In some embodiments, thelight shielding member 410 can be disposed on the first substrate 200and/or the second substrate 400. In some embodiments, one or moreinsulation layers can be disposed between the light shielding member 410and the substrate (such as the second substrate 400). The insulationlayer(s) can include organic material, inorganic material, or othersuitable material, but it is not limited thereto.

When the light T emitted from the light source 100 passes through thefirst substrate 200 and the second substrate 400, a portion of the lightT may be reflected to the edge of the display device 10 by the wires 210and/or other member. This portion of the light T may leak from the gapbetween the second substrate 400 and the frame 500, so that the observerfacing the display surface can see the light leakage. Furthermore, dueto the moving angle, a portion of the light T is reflected or refractedto the edge of the display device 10 at the interface between the lightsource 100 and the first substrate 200, the interface between the firstsurface 200 and the liquid crystal layer 300, or the interface betweenthe liquid crystal layer 300 and the second substrate 400. In someembodiments, a portion of the light T generates total internalreflection in the first substrate 200 and/or the second substrate 400(as shown in FIG. 3 ), leaves the lateral side of the first substrate200 and/or the second substrate 400 (such as two opposite sides 220and/or 420), and is emitted into the gap between the frame 500 and thefirst substrate 200 and/or the second substrate 400. In this case, theobserver facing the display surface may see the light leakage too.

The display device 10 in this embodiment changes the structures of thefirst substrate 200 to reduce the light leakage observed by the observerfacing the display surface. Referring to FIGS. 1 and 4 , the firstsubstrate 200 has two opposite surfaces (i.e. the upper surface 201 andthe lower surface 202) and two opposite sides 220 connected to theaforementioned two opposite surfaces.

The upper surface 201 is substantially parallel to the lower surface202, and a vertical portion 221 and an inclined portion 222 are formedon at least one of the two opposite sides 220. The vertical portion 221is disposed between the upper surface 201 and the inclined portion 222,and connects the upper surface 201 to the inclined portion 222. Thevertical portion 221 is substantially perpendicular to the upper surface201. In some embodiments, at least a portion of the lateral surface ofthe first substrate 200 and/or the second substrate 400 can includeinclined portion 222 and/or inclined portion, but it is not limitedthereto. The inclined portion 222 is disposed between the verticalportion 221 and the lower surface 202, and connects the vertical portion221 to the lower surface 202. The inclined portion 222 is inclinedrelative to the lower surface 202. The other one of the two oppositesides 220 can merely has a vertical portion (not shown), and thisvertical portion (not shown) can be connected to the upper surface 201and the lower surface 202 and substantially perpendicular to the uppersurface 201 and the lower surface 202, but it is not limited thereto. Insome embodiments, the surface of the vertical portion (not shown) is notsmooth, and the extending line of the surface can substantiallyperpendicular to the upper surface 201 and the lower surface 202, but itis not limited thereto. In some embodiments, the lower surface 202connected to the inclined portion 222 faces the light source 100. Insome embodiments, the first substrate 200 adjacent to the light source100 has two vertical portions 221 and two inclined portions 222 on thetwo opposite sides 220 (as shown in FIG. 1). In some embodiments, theupper surface 201 and the lower surface 202 are substantially parallelto the X-axis, but it is not limited thereto. In some embodiments, theterm “substantially perpendicular to” means the included angle betweentwo lines, two surfaces, or one line and one surface is between 85degrees and 95 degrees (80°≤the included angle≤90°, but it is notlimited thereto.

The upper surface 201 and the lower surface 202 of the first substrate200 respectively faces the liquid crystal layer 300 and the light source100. As shown in FIG. 4 , in some embodiments, a portion of the light Temitted from the light source 100 enters the first substrate 200 fromits lower surface 202, and is reflected or refracted in the firstsubstrate 200 to the inclined portion 222 on at least one side 220 ofthe first substrate 200. That is, a portion of the light T moves in thefirst substrate 200, and is guided by the inclined portion 222 to leavethe first substrate 200. The guiding direction of the portion of light Tguiding by the inclined portion 222 is different from the direction ofthe light T emitted from the light source passing the first substrate200 and the second substrate 400 (for example, the direction of thelight shown in FIG. 1 , and/or the direction of the light leaving fromthe upper surface 201 shown in FIG. 3 , but it is not limited thereto).

In detail, after the light T moving in the first substrate 200 contactsthe inclined portion 222, the aforementioned portion of light T canleave the first substrate 200 from the inclined portion 222. Since theinclined portion 222 faces away from the display surface of the displaydevice 10, the light T leaving the first substrate 200 from the inclinedportion 222 moves away from the display surface of the display device10. The probability that the observer facing the display surface seesthe light T leaving the substrate from the inclined portion 222 isreduced, so that the light leakage can be improved.

In this embodiment, the inclined angle θ between the inclined portion222 and the lower surface 202 is greater than 90 degrees and less than180 degrees (90°<θ<180°), such as 100°, 110°, 120°, 130°, 140°, 150°,160°, or 170°. Therefore, most of the light T leaving from a side 202 ofthe first substrate 200 can pass the inclined portion 222. In someembodiments, the included angle θ is between 135° and 165°, but it isnot limited thereto. When the included angle θ is small (for example,less than 135°, but it is not limited thereto), the edge of the firstsubstrate 200 becomes thinner, and the strength of the first substrate200 may be influenced. When the included angle θ is large (for example,greater than 165°, but it is not limited thereto), the inclined portion222 may have a large region, and the width of the periphery of thedisplay device 10 may be influenced.

Although the inclined portion 222 with large area can efficiently reducethe light leakage at the lateral side, the first substrate 200 may nothave enough strength when the dimensions of the vertical portion 221 aretoo small. Therefore, the length of the vertical portion 221 can begreater than half the thickness of the first substrate 200, and theratio of the length of the inclined portion 222 to the length of thevertical portion 221 (the length of the inclined portion 222/the lengthof the vertical portion 221) is between 0.2 and 2 (0.2 the ratio such as0.5, 1, or 1.5, but it is not limited thereto. Thus, it can be ensuredthat the first substrate 200 has enough thickness and strength, or thelight leakage at the lateral side can be efficiently reduced.

Furthermore, the roughness of the surface influences whether the light Tcan easily pass through the surface. When the roughness of the surfaceis larger, the roughness surface can destroy a greater amount of thetotal internal reflection. Therefore, the light T moves toward thesurface can leave from the surface easily, and vice versa. Thus, in thisembodiment, the roughness of the surface of the inclined portion 222 canbe enhanced by grinding, and the roughness of the inclined portion 222is greater than the roughness of the vertical portion 221. The light Tcan leave the first substrate 220 from the inclined portion 222 moreeasily. For example, the roughness of the inclined portion 222 isbetween 1 μm and 5 μm (1 μm≤the roughness≤5 μm), such as 1.5 μm, 2 μm,2.5 μm, 3 μm, or 4 μm, but it is not limited thereto. The “roughness” isreferred to an arithmetic mean roughness (Ra), that is, the arithmeticmean of the distance from the center line of the sampling part to theappearance deviation value, but it is not limited thereto. For example,the roughness can be measured in a rectangular region with the sidelength of 10 μm, 50 μm, or 200 μm, but it is not limited thereto. Thesize of the side length of the rectangular region can be adjustedaccording to the dimensions of the substrate. In some embodiments, theposition of the inclined portion 222 substantially corresponds to thecutting position of the cutter wheel, which cuts a large substrate tothe first substrate 200 or the second substrate 400, in the cuttingprocess, but it is not limited thereto. In some embodiments, the firstsubstrate 200 can include two inclined portions, the roughness of one ofthe inclined portions (such as the inclined portion 222) is differentfrom that of the other one of the inclined portions. In someembodiments, the roughness of one of the inclined portions (such as theinclined portion 222) is the same as that of the other one of theinclined portions, but it is not limited thereto. The second substrate400 can also include the same structure, so that the features thereofare not repeated in the interest of brevity. In some embodiments, thefirst substrate 200 can include at least one inclined portion (such asthe inclined portion 222), the second substrate 400 can include at leastone inclined portion, and the roughness of the inclined portion of thefirst substrate 200 is different from that of the inclined portion ofthe second substrate 400. In some embodiments, the roughness of theinclined portion of the first substrate 200 is the same as that of theinclined portion of the second substrate 400. Also, the inclined portion222 of the first substrate 200 can be greater than the lower surface 202and/or the upper surface 201 in roughness.

Moreover, as shown in FIG. 2 , the light leakage at the side disposedthe circuit board W may be shielded by a portion of circuit board W, sothat the inclined portion 222 is not required. In other words, theinclined portion 222 and the circuit board W are disposed on differentsides of the first substrate 200.

In some embodiment, the second substrate 400 also includes two oppositesurfaces (i.e. the upper surface 401 and the lower surface 402) and twoopposite sides 420 connected to the aforementioned two oppositesurfaces. A vertical portion and an inclined portion are formed on atleast one of the two opposite sides 420. The structures and theconnection relationships of the upper surface 401, the lower surface402, the vertical portion, and the inclined portion of the secondsubstrate 400 are the same as or similar to the upper surface 201, thelower surface 202, the vertical portion 221, and the inclined portion222 of the first substrate 200, so that the structures and theconnection relationships thereof are not repeated in the interest ofbrevity. The display device 10 can further reduce the light leakage atthe lateral side by the inclined portion of the second substrate 400,but it is not limited thereto.

In some embodiments, the inclined portion can be merely formed on thefirst substrate 200 or the second substrate 400 of the display device10, and the other one of the first substrate 200 or the second substrate400 is a cuboid without inclined portion, but it is not limited thereto.In some embodiments, the inclined portion is disposed between the liquidcrystal layer 300 and the light source 100. In others embodiments, theliquid crystal layer 300 is disposed between the inclined portion andthe light source 100.

FIGS. 5A-5C are schematic diagrams of the first substrate 200 accordingto different embodiments of the disclosure. As shown in FIGS. 5A-5C, aside 220 of the first substrate 200 includes a vertical portion 221connected to an upper surface 201, and an inclined portion 222 connectedto a lower surface 202. The surface of the inclined portion 222 is notsmooth, so that the roughness of the inclined portion 222 is greaterthan the roughness of the vertical portion 221.

It should be noted that, in some embodiments, the vertical portion 221and the inclined portion 222 of the first substrate 200 has bumpysurfaces, so that the related parameters can be measured by thefollowing method, but it is not limited thereto. In the normalcondition, the related parameters can be directly measured.

First, the user can measure a distance D between the upper surface 201and the lower surface 402 in a direction perpendicular to the uppersurface 201 and the lower surface 402 of the first substrate 200 at aposition spaced a distance L away from the corner between the uppersurface 201 and the vertical portion 221. For example, theaforementioned distance L can be 0.5 mm, 1 mm, or 2 mm, but it is notlimited thereto. The distance L can be determined according to thedimensions or the thickness of the substrate. It should be noted that,the point spaced the distance L away from the vertical portion 221 (thepoint used to define the distance D) can be projected on the lowersurface 202 of the first substrate 200. In other words, the point spacedthe distance L away from the vertical portion 221 is not projected onthe inclined portion 222.

In the direction substantially perpendicular to the lower surface 202,the position spaced 0.85 D away from the lower surface 202 can beprojected on one side 220 of the first substrate 200 to form a firstintersection P1, and the position spaced 0.99 D away from the lowersurface 202 can be projected on the side 220 of the first substrate 200to form a second intersection P2. The connection line between the firstintersection P1 and the second intersection P2 is a first virtual lineAX1. In the embodiment shown in FIGS. 5A-5C, both the first intersectionP1 and the second intersection P2 are located on the vertical portion221, and the included angle between the first virtual line AX1 and theupper surface 201 of the first substrate 200 is between 80 degrees and100 degrees (80°<the included angle<100°), such as 82.5°, 85°, 95°, or97.5°, but it is not limited thereto. In some embodiments, the includedangle between the first virtual line AX1 and the upper surface 201 ofthe first substrate 200 is between 85 degrees and 95 degrees (85°<theincluded angle<95°).

In the direction substantially perpendicular to the upper surface 201,the position spaced 0.85 D away from the upper surface 201 can beprojected on the side 220 of the first substrate 200 to form a thirdintersection P3, and the position spaced 0.99 D away from the uppersurface 201 can be projected on the side 220 of the first substrate 200to form a fourth intersection P4. The connection line between the thirdintersection P3 and the fourth intersection P4 is a second virtual lineAX2. In the embodiments shown in FIGS. 5A-5C, both the thirdintersection P3 and the fourth intersection P4 are located on theinclined portion 222, and an obtuse angle is formed between the secondvirtual line AX2 and the lower surface 202 of the first substrate 200.This obtuse angle can be referred to the included angle θ between theinclined portion 222 and the lower surface 202.

In the embodiment shown in FIG. 5A, a portion of the upper surface 201adjacent to the side 220 of the first substrate 200 is inclined towardthe lower surface 202, and a portion of the vertical portion 221 isconcave. Thus, the included angle between the first virtual line AX1 andthe upper surface 201 of the first substrate 200 is between 90 degreesand 95 degrees, but it is not limited thereto.

In the embodiment shown in FIG. 5B, the upper surface 201 issubstantially horizontal, so that the included angle between the firstvirtual line AX1 and the upper surface 201 of the first substrate 200 isbetween 85 degrees and 90 degrees, but it is not limited thereto.

In the embodiment shown in FIG. 5C, the upper surface 201 issubstantially horizontal, and a portion of the vertical portion 221 isconvex. Thus, the included angle between the first virtual line AX1 andthe upper surface 201 of the first substrate 200 is between 90 degreesand 95 degrees, but it is not limited thereto.

The features between the aforementioned embodiments can be used orcombined as long as they do not violate the spirit or conflict.

In summary, a display device is provided, including two substrates and aliquid crystal layer. Each of the substrates has two opposite surfacesand two opposite sides. The liquid crystal layer is sandwiched betweenthe two substrates. At least one of the two substrates has an inclinedportion on at least one of the two opposite sides which is connected toone of the two opposite surfaces, and has an included angle greater than90 degrees and less than 180 degrees in association with the connectedsurface.

The display device can further include a light source. The light emittedfrom the light source passes through the one of the two substratesbetween which the liquid crystal is sandwiched, and a portion of thelight moves in the one of the two substrates and is guided by theinclined portion off the one of the two substrates in a differentdirection than the light passing through the two substrates. Forexample, the direction of the light guided by the inclined portion isopposite to the direction of the light passes through the twosubstrates, so as to reduce the light leakage at the lateral side of thedisplay device.

Although some embodiments of the present disclosure and their advantageshave been described in detail, it should be understood that variouschanges, substitutions and alterations can be made herein withoutdeparting from the spirit and scope of the disclosure as defined by theappended claims. For example, it will be readily understood by thoseskilled in the art that many of the features, functions, processes, andmaterials described herein may be varied while remaining within thescope of the present disclosure. Moreover, the scope of the presentapplication is not intended to be limited to the particular embodimentsof the process, machine, manufacture, compositions of matter, means,methods and steps described in the specification. As one of ordinaryskill in the art will readily appreciate from the disclosure of thepresent disclosure, processes, machines, manufacture, compositions ofmatter, means, methods, or steps, presently existing or later to bedeveloped, that perform substantially the same function or achievesubstantially the same result as the corresponding embodiments describedherein may be utilized according to the present disclosure. Accordingly,the appended claims are intended to include within their scope suchprocesses, machines, manufacture, compositions of matter, means,methods, or steps. Moreover, the scope of the appended claims should beaccorded the broadest interpretation so as to encompass all suchmodifications and similar arrangements.

While the disclosure has been described by way of example and in termsof preferred embodiment, it should be understood that the disclosure isnot limited thereto. On the contrary, it is intended to cover variousmodifications and similar arrangements (as would be apparent to thoseskilled in the art). Therefore, the scope of the appended claims shouldbe accorded the broadest interpretation to encompass all suchmodifications and similar arrangements.

What is claimed is:
 1. An electronic device, comprising: a frame; and asubstrate, disposed in the frame, and having a first surface, a secondsurface opposite to the first surface, and a first side connecting thefirst surface and the second surface; and a light source, disposedbetween the substrate and the frame, wherein a vertical portion and aninclined portion are formed on the first side, the vertical portion isdisposed between the first surface and the inclined portion, theinclined portion is disposed between the frame and the vertical portion,the vertical portion is substantially perpendicular to the firstsurface, and a portion of the vertical portion is concave in across-sectional view, wherein an included angle between the inclinedportion and the second surface is greater than 90 degrees and less than180 degrees, and the inclined portion is greater than the verticalportion in roughness.
 2. The electronic device as claimed in claim 1,wherein the inclined portion is adjacent to the light source.
 3. Theelectronic device as claimed in claim 1, wherein the inclined portion isgreater than the first surface in roughness.
 4. The electronic device asclaimed in claim 3, wherein the inclined portion is greater than thesecond surface in roughness.
 5. The electronic device as claimed inclaim 1, wherein the substrate has a second side opposite to the firstside, the second side connecting the first surface and the secondsurface, and an another inclined portion and an another vertical portionare formed on the second side.
 6. The electronic device as claimed inclaim 1, further comprising a circuit board disposed on a side of thesubstrate.
 7. The electronic device as claimed in claim 1, wherein in adirection substantially perpendicular to the second surface, a distanceis formed between the first surface and the second surface, a positionspaced 0.85 times the distance away from the second surface is projectedon the first side to form a first intersection, and another positionspaced 0.99 times the distance away from the second surface is projectedon the first side to form a second intersection, wherein an anglebetween the first surface and a connection line of the firstintersection and the second intersection is greater than 90 degrees andless than 95 degrees.